How to dynamically apply a theme sitewide?

[Todd Davis]

I saw a demo on how to dynamically change a single control bound to a combobox, something like this:

telerik:StyleManager.Theme="{Binding SelectedValue, ElementName=themesBox}

That's all well and good, but I want to change the theme site-wide via the combobox. So I tried doing this in the MasterPage, again, bound to the ComboBox:

        private void Theme_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            switch (Theme.SelectedItem.ToString())
            {
                case "Office Blue":
                    StyleManager.ApplicationTheme = new Office_BlueTheme();
                    break;
                case "Office Black":
                    StyleManager.ApplicationTheme = new Office_BlackTheme();
                    break;
                case "Office Silver":
                    StyleManager.ApplicationTheme = new Office_SilverTheme();
                    break;
                case "Vista":
                    StyleManager.ApplicationTheme = new VistaTheme();
                    break;
                case "Summer":
                    StyleManager.ApplicationTheme = new SummerTheme();
                    break;
                case "Windows 7":
                    StyleManager.ApplicationTheme = new Windows7Theme();
                    break;
            }
        }
    }

However, nothing changes when select a new setting. Is there something else I need to call in order to make the change "take"?

[Yavor Georgiev]

Hello Todd Davis,

 Regrettably, Silverlight does not allow us to do that. You will have to bind each control that you want to apply a  theme to like so:

<telerik:RadButton telerik:StyleManager.Theme="{Binding SelectedValue, ElementName=themesBox}">Click me!</telerik:RadButton>

That is why the only place where you can set the ApplicationTheme in code-behind for it to have any effect is before InitializeComponent() is called and the controls are created.

All the best,
Yavor Georgiev
the Telerik team

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